CN204158479U - A kind of bone screw and stretcher thereof - Google Patents
A kind of bone screw and stretcher thereof Download PDFInfo
- Publication number
- CN204158479U CN204158479U CN201420568993.8U CN201420568993U CN204158479U CN 204158479 U CN204158479 U CN 204158479U CN 201420568993 U CN201420568993 U CN 201420568993U CN 204158479 U CN204158479 U CN 204158479U
- Authority
- CN
- China
- Prior art keywords
- bone screw
- stretcher
- adjutages
- groove
- limiting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Surgical Instruments (AREA)
Abstract
This utility model provides a kind of bone screw and stretcher thereof, and bone screw comprises ailhead, nail body and two limiting plates, and two limiting plates are fixed on ailhead upper end, and described limiting plate left and right both ends of the surface are respectively equipped with draw-in groove, and described draw-in groove is communicated with the inwall of limiting plate; Described stretcher comprises an adapter sleeve shaft-like adjutage identical with two structures, adjutage is provided with auxiliary section, pars intermedia and connecting portion, adapter sleeve is enclosed within auxiliary section and is clipped together by two adjutages, gap is had between two pars intermedias, two connecting portions are respectively equipped with the groove coordinated with bone screw limiting plate, be provided with two fixture blocks in groove, fixture block matches with the draw-in groove on bone screw limiting plate.Stretcher of the present utility model comprises two independently adjutages, therefore very easily can realize wearing pitman, compresses pitman, install the operations such as bone screw nut, bring great convenience to modern minimally invasive spine surgical.
Description
Technical field
This utility model relates to medical apparatus and instruments, particularly relates to a kind of bone screw and stretcher thereof.
Background technology
Bone screw, i.e. pedicle of vertebral arch screw, it is widely used in spinal surgery.Bone screw stretcher (abbreviation stretcher) is a kind of minimally invasive spine surgical instrument, its using method is: on skin, open minimal incision *, after the adjutage assembly connection of bone screw and stretcher, be installed in vertebral body through skin incision place, follow-up related surgical operation is all complete in the passage of two adjutages formation.
Stretcher has very important effect in minimally invasive spine surgical, and its major function is: 1) stably hold on bone screw, bone screw is placed into enabling doctor's safety and precise and needs position that is fixing or that insert; 2) in the passage of two adjutages formation, pitman is installed; 3) by stretcher, pitman is pressed onto the position of requirement; 4) by stretcher, nut is screwed in bone screw.Existing stretcher can be divided into two classes substantially: the complicated structure of first kind stretcher, function is more, but because the more meeting of function brings structural complexity, when operation technique, a lot of difficulty can be brought to doctor, simultaneously larger to the size of skin incision when performing the operation with this stretcher, the injury caused patient is also large; The structure of Equations of The Second Kind stretcher is comparatively simple, but the function ratio that this class formation realizes is less, is sometimes difficult to the requirement meeting operation.So need a kind ofly can overcome existing stretcher not enough new stretcher structure and bone screw of matching with this stretcher on using.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of bone screw be convenient to stretcher and held, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, this utility model adopts following technical scheme: a kind of bone screw, comprise ailhead, nail body and two limiting plates, the lower end of described two limiting plates is fixed on ailhead upper end, two limiting plates are oppositely arranged, the inwall of two limiting plates and the end face of ailhead form U-lag, and described limiting plate left and right both ends of the surface are respectively equipped with draw-in groove, and described draw-in groove is communicated with the outer wall of limiting plate.
Preferably, the top of described draw-in groove is communicated with the outer wall of limiting plate.
Another problem to be solved in the utility model is to provide one and is convenient to hold above-mentioned bone screw, and then facilitate the stretcher of operation technique, it adopts following technical scheme: described stretcher comprises an adapter sleeve shaft-like adjutage identical with two structures, described adjutage is followed successively by auxiliary section from top to bottom, pars intermedia and connecting portion, two adjutages are clipped together by the auxiliary section that described adapter sleeve is enclosed within two adjutages, gap is had between described two pars intermedias, the side that described two connecting portions are relative is respectively equipped with the groove coordinated with bone screw limiting plate, two fixture blocks are provided with in described groove, described fixture block matches with the draw-in groove on bone screw limiting plate.
Preferably, the cross section of the auxiliary section of described two adjutages is semicircle, after two auxiliary sections stick together in a tubular form.
Further, described adapter sleeve is provided with female thread, is provided with external screw thread outside the auxiliary section of described two adjutages, and described adapter sleeve is threaded with two adjutages.
Preferably, be provided with female thread inside the auxiliary section of described two adjutages, two auxiliary sections stick together rear formation one screwed hole.
Preferably, the auxiliary section of described adjutage is provided with mating holes, and after two adjutages stick together, two mating holes alignment, are provided with connecting pin in described mating holes.
As mentioned above, a kind of bone screw of this utility model and stretcher thereof, have following beneficial effect:
The bone screw cooperatively interacted in this utility model and stretcher, its stable connection, can not arbitrarily be separated, and effectively prevent the situation that when installing bone screw, bone screw drops.In addition, described stretcher is made up of adapter sleeve and two adjutages that match, very easily pitman can be placed by the folding of two adjutages, by two adjutage laminatings after placing pitman, compress pitman by the space of screwed hole and centre, and the nut of bone screw is installed, after having worked, screwed off by adapter sleeve, two adjutages are backed off respectively, simple to operate, quick.More than comprehensive, this utility model brings great convenience to modern minimally invasive spine surgical, therefore has very large promotional value.
Accompanying drawing explanation
Fig. 1 is that in this utility model, bone screw is structure chart.
Fig. 2 is a kind of embodiment schematic diagram of bone screw in this utility model.
Fig. 3 is the structure chart of stretcher in this utility model.
Fig. 4 is the adjutage structure chart in this utility model in stretcher.
Fig. 5 is the enlarged drawing at A place in Fig. 4.
Fig. 6 is the mounting means schematic diagram of stretcher and bone screw in this utility model.
Fig. 7 is the schematic diagram that is connected of stretcher and bone screw in this utility model.
Fig. 8 is the enlarged drawing at B place in Fig. 7.
In figure: 11 ailhead 111 ball-and-sockets
12 nail body 121 bulbs
13 limiting plate 131 draw-in grooves
2 adapter sleeve 3 adjutages
31 auxiliary section 311 external screw threads
312 female thread 313 mating holes
32 pars intermedia 33 connecting portions
331 groove 332 fixture blocks
4 screwed hole 5 connecting pins
Detailed description of the invention
The structure that Figure of description illustrates, ratio, size etc., content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of this utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that this utility model can produce and the object that can reach, all should still drop in scope that technology contents that this utility model discloses can contain.Simultaneously, quote in this description as " on ", D score, "front", "rear", the term such as " centre ", also only for ease of understanding of describing, and be not used to limit the enforceable scope of this utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of this utility model.
Bone screw is a kind of medical apparatus and instruments be applied in modern medicine in spinal operation, and bone screw is also called pedicle screw.Be illustrated in figure 1 a kind of bone screw of this utility model, comprise ailhead 11, nail body 12 and two limiting plates 13, the lower end of described two limiting plates 13 is fixed on ailhead 11 upper end, two limiting plates 13 are oppositely arranged, the inwall of two limiting plates 13 and the end face of ailhead 11 form U-lag, and described U-lag is for placing the pitman in spinal operation; Described limiting plate about 13 both ends of the surface are respectively equipped with draw-in groove 131, and described draw-in groove 131 is communicated with the outer wall of limiting plate 13.
In the present embodiment, conveniently bone screw was installed with coordinating of stretcher, and the top of described draw-in groove 131 is communicated with the outer wall of limiting plate 13, and when mounted, the adjutage of stretcher can directly insert its draw-in groove 131 from the oblique upper of bone screw.
In a preferred embodiment, as shown in Figure 2, described nail body 12 upper end is provided with bulb 121, described ailhead 11 is provided with ball-and-socket 111, described bulb 121 coordinates with ball-and-socket 111 is hinged, and ailhead 11 and nail body 12 form universal shaft structure, reach the object of adjustment flexibly with this.The needs that bone screw of the present utility model uses according to reality, described ailhead 11 also can be fixedly connected with nail body 12.
This utility model also proposes a kind of stretcher for clamping above-mentioned bone screw, composition graphs 1-Fig. 5, it is identical with two structures that described stretcher comprises an adapter sleeve 2, and independently shaft-like adjutage 3, as shown in Figure 3, Figure 4, described adjutage 3 is followed successively by auxiliary section 31, pars intermedia 32 and connecting portion 33 from top to bottom.Two adjutages 3 are clipped together by the auxiliary section 31 that described adapter sleeve 2 is enclosed within two adjutages 3, and adapter sleeve 2 has multiple enforcement structure, and such as adapter sleeve 2 is buckles, are clamped two auxiliary sections 31 by buckle; Such as adapter sleeve 2 is clamps again, is clamped two auxiliary sections 31 by clamp.Have gap between described two pars intermedias 32, described gap is for installing the pitman in spinal operation subsequent process.Composition graphs 1, Fig. 4 and Fig. 5, the side that described two connecting portions 33 are relative is respectively equipped with the groove 331 coordinated with bone screw limiting plate 13, is provided with two fixture blocks 332 in described groove 331, and described fixture block 332 matches with the draw-in groove 131 on bone screw limiting plate 13.
In the present embodiment, as shown in Figure 3, Figure 4, the cross section of the auxiliary section 31 of described two adjutages 3 is semicircle, after two auxiliary sections 31 stick together in a tubular form.Structure according to the known adapter sleeve of foregoing 2 can have multiple, and in the present embodiment preferably, described adapter sleeve 2 is provided with female thread, is provided with external screw thread 311 outside the auxiliary section 31 of described two adjutages 3, and described adapter sleeve 2 is threaded with two adjutages 3.Be threaded connection not only stable but also facilitate.
In the present embodiment, as shown in Figure 3, Figure 4, be provided with female thread 312 inside the auxiliary section 31 of described two adjutages 3, two auxiliary sections 31 stick together rear formation one screwed hole 4.The nut of bone screw can be installed by screwed hole 4; Or the instrument being convenient to use in other operations passes through, such as, for compressing the specific purpose tool of pitman, specific purpose tool is provided with external screw thread, and specific purpose tool and screwed hole 4 threaded engagement, play the effect to the heart, prevent specific purpose tool from offseting.
In the present embodiment, as shown in Figure 4, the auxiliary section 31 of described adjutage 3 is provided with mating holes 313, after two adjutages 3 stick together, two mating holes 313 align, connecting pin 5 is provided with in described mating holes 313, two adjutages 3 to be alignd installation by connecting pin 5, both served and prevented two adjutages 3 from relative movement occurring, the effect aligned can be played again, namely first allow two adjutages 3 be in steady statue, and then install adapter sleeve 3, what such adapter sleeve 2 can be more prone to is spun on the external screw thread 311 of adjutage 3 auxiliary section 31.In the present embodiment, the mating holes 313 on described adjutage 3 is respectively equipped with two, and is positioned at the left and right sides of adjutage 3 auxiliary section 31.
Stretcher entirety described in the utility model can be metal material also can be nonmetallic materials.
Composition graphs 1-Fig. 8, the installation fit system of described stretcher and bone screw is:
As shown in Figure 6, two adjutages 3 are matched with bone screw respectively, during installation, the connecting portion 33 of adjutage 3 is inserted draw-in groove 131 from the oblique upper of bone screw limiting plate 13 both sides, allow the fixture block 332 on adjutage 3 match with draw-in groove 131, the angle of insertion is advisable for being 30 ° ~ 50 ° with bone screw length direction; As shown in Figure 7, Figure 8, when the fixture block 332 on two adjutages 3 all inserts after draw-in groove 131 is mated, the auxiliary section 31 of two adjutages 3 is sticked together, by connecting pin 5, two adjutages 3 are docked, after connecting, adapter sleeve 2 is spun on the external screw thread 311 of two adjutage 3 auxiliary sections 31.The bone screw connected and stretcher can not separate because of draw-in groove 131 and the mating reaction of fixture block 332, prevent during operation and occur the situation that bone screw drops.The installation that spinal column carries out bone screw just can be implanted after bone screw and stretcher connect, when performing the operation, when pitman installed by needs, adapter sleeve 2 is screwed off, then separates two adjutages 3, pitman is directly put into the U-lag of bone screw, very simple and convenient, after placing, adapter sleeve 2 is spun on adjutage 3 again, carries out the follow-up works such as nut installation by the screwed hole 4 on stretcher.After bone screw installs, screw off adapter sleeve 2, two adjutages 3 are backed off from bone screw respectively, finishes the work.
In sum, a kind of bone screw of this utility model and stretcher thereof, can solve stretcher in prior art and sometimes can not meet the confinement problems of job demand.So this utility model effectively overcomes practical problems more of the prior art thus has very high value and use meaning.
Above-mentioned embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting this utility model.This utility model also has many aspects can improve under the prerequisite of overall thought, all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or change for person skilled in the art scholar.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that this utility model discloses, must be contained by claim of the present utility model.
Claims (7)
1. a bone screw, comprise ailhead (11), nail body (12) and two limiting plates (13), the lower end of described two limiting plates (13) is fixed on ailhead (11) upper end, two limiting plates (13) are oppositely arranged, the inwall of two limiting plates (13) and the end face of ailhead (11) form U-lag, it is characterized in that: described limiting plate (13) left and right both ends of the surface are respectively equipped with draw-in groove (131), and described draw-in groove (131) is communicated with the outer wall of limiting plate (13).
2. a kind of bone screw according to claim 1, is characterized in that: the top of described draw-in groove (131) is communicated with the outer wall of limiting plate (13).
3. one kind for clamping the stretcher of bone screw described in claim 1, it is characterized in that: described stretcher comprises an adapter sleeve (2) the shaft-like adjutage (3) identical with two structures, described adjutage (3) is followed successively by auxiliary section (31) from top to bottom, pars intermedia (32) and connecting portion (33), two adjutages (3) are clipped together by the auxiliary section (31) that described adapter sleeve (2) is enclosed within two adjutages (3), gap is had between described two pars intermedias (32), the relative side of described two connecting portions (33) is respectively equipped with the groove (331) coordinated with bone screw limiting plate (13), two fixture blocks (332) are provided with in described groove (331), described fixture block (332) matches with the draw-in groove (131) on bone screw limiting plate (13).
4. a kind of stretcher for clamping bone screw according to claim 3, it is characterized in that: the cross section of the auxiliary section (31) of described two adjutages (3) is semicircle, after two auxiliary sections (31) stick together in a tubular form.
5. a kind of stretcher for clamping bone screw according to claim 4, it is characterized in that: described adapter sleeve (2) is provided with female thread, the outside, auxiliary section (31) of described two adjutages (3) is provided with external screw thread (311), and described adapter sleeve (2) is threaded with two adjutages (3).
6. a kind of stretcher for clamping bone screw according to claim 3, it is characterized in that: the inner side, auxiliary section (31) of described two adjutages (3) is provided with female thread (312), and two auxiliary sections (31) stick together rear formation one screwed hole (4).
7. a kind of stretcher for clamping bone screw according to claim 3, it is characterized in that: the auxiliary section (31) of described adjutage (3) is provided with mating holes (313), after two adjutages (3) stick together, two mating holes (313) alignment, are provided with connecting pin (5) in described mating holes (313).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568993.8U CN204158479U (en) | 2014-09-29 | 2014-09-29 | A kind of bone screw and stretcher thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568993.8U CN204158479U (en) | 2014-09-29 | 2014-09-29 | A kind of bone screw and stretcher thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204158479U true CN204158479U (en) | 2015-02-18 |
Family
ID=52532218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420568993.8U Active CN204158479U (en) | 2014-09-29 | 2014-09-29 | A kind of bone screw and stretcher thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204158479U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106473783A (en) * | 2016-11-22 | 2017-03-08 | 常州华森医疗器械有限公司 | Pedicle of vertebral arch fixed system is with strutting piece |
| CN106510834A (en) * | 2016-11-22 | 2017-03-22 | 常州华森医疗器械有限公司 | Installation tool for pedicle fixation system |
| CN106901824A (en) * | 2015-12-23 | 2017-06-30 | 上海三友医疗器械股份有限公司 | A kind of upper nail for pedicle screw fixation system puts rod device |
| CN106901825A (en) * | 2015-12-23 | 2017-06-30 | 上海三友医疗器械股份有限公司 | A kind of installation tool of pedicle screw fixation system |
-
2014
- 2014-09-29 CN CN201420568993.8U patent/CN204158479U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106901824A (en) * | 2015-12-23 | 2017-06-30 | 上海三友医疗器械股份有限公司 | A kind of upper nail for pedicle screw fixation system puts rod device |
| CN106901825A (en) * | 2015-12-23 | 2017-06-30 | 上海三友医疗器械股份有限公司 | A kind of installation tool of pedicle screw fixation system |
| CN106901824B (en) * | 2015-12-23 | 2019-08-20 | 上海三友医疗器械股份有限公司 | A kind of upper nail for pedicle screw fixation system sets stick device |
| CN106901825B (en) * | 2015-12-23 | 2019-08-20 | 上海三友医疗器械股份有限公司 | A kind of installation tool of pedicle screw fixation system |
| CN106473783A (en) * | 2016-11-22 | 2017-03-08 | 常州华森医疗器械有限公司 | Pedicle of vertebral arch fixed system is with strutting piece |
| CN106510834A (en) * | 2016-11-22 | 2017-03-22 | 常州华森医疗器械有限公司 | Installation tool for pedicle fixation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204158479U (en) | A kind of bone screw and stretcher thereof | |
| US9517090B2 (en) | Polyaxial cross connector | |
| US20140025076A1 (en) | External fixation system | |
| CN101304699A (en) | Headless compression screw with integrated reduction-compression instrument | |
| TW200722032A (en) | External fixation system and method of use | |
| CN103735306A (en) | Frame-type pressurizing multipurpose guider | |
| CN104688326A (en) | Pedicle screw nailing device | |
| CN105078562A (en) | Medical screw with connector | |
| CN105496533A (en) | Self-locking universal nail | |
| CN105411657B (en) | Orthopaedics glenoid lip of articulation of humerus fix tool system | |
| CN202154720U (en) | Double-joint distraction pincers | |
| CN107518937B (en) | Connection adapter and fixed system for pedicle screw | |
| CN203280475U (en) | Spine spondylolysis internal fixation device | |
| CN203915046U (en) | A kind of Orthopaedic external fixator | |
| CN203829030U (en) | Femoral neck hollow rivet guider | |
| CN203609508U (en) | Bar placing device | |
| CN206700182U (en) | Multidirectional pull device for spinal surgery | |
| CN210447177U (en) | Spine isthmus internal fixation device | |
| CN203749538U (en) | Self-locking outer fixing frame connecting clamping head | |
| Wang et al. | Perfusion pressure of a new cannulating fenestrated pedicle screw during cement augmentation | |
| CN203591320U (en) | Tail-breaking device | |
| CN204562352U (en) | A kind of Medical screw with adapter | |
| CN103431899B (en) | Multifunctional traction repositor | |
| CN105455926A (en) | Vertebral plate interbody fusion cage | |
| CN104814785A (en) | Ulna coracoid process lateral column steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |